The SWP-27340304-28-E1-3 from ERAVANT is a Waveguide Combiner / Divider with Frequency 26.5 to 40 GHz, Amplitude Balance ±0.4 dB, Insertion Loss 0.5 dB, Isolation 20 to 30 dB, Return Loss 15 dB. More details for SWP-27340304-28-E1-3 can be seen below.